一种特殊情况是：在仅有一个子控件时，该控件的大小被设置为填充整个父复合控件的大小。

A special case is when there is only one child control, in which case the control is sized to fill the entire parent composite.

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LockablePivot为Pivot控件添加了一种特殊的模式，使之只显示当前项(通常用于多项选择)。

LockablePivot adds a special mode to the Pivot control where only the current item is shown (often used with multiple selection).

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一种特殊的输入控件。快速跳转就是一种覆盖层控件。

An input widget of a special kind. Goto Anything is an overlay.

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